Magnetic Resonance ImagingBrain MappingFrontal LobeGyrus CinguliPrefrontal CortexImage Processing, Computer-AssistedParietal LobeFunctional LateralityCerebral CortexTemporal LobeMental ProcessesBrainPsychomotor PerformanceTomography, Emission-ComputedNeural PathwaysSchizophreniaNeuropsychological TestsSemanticsMotor CortexNerve NetCognitionReaction TimeCerebrovascular CirculationMemoryPhotic StimulationOxygenPostmortem ChangesAnalysis of VarianceCase-Control StudiesVisual Cortex